public class TestDemo {
    public static void main(String[] args) {
        Student s1 = new Student();
        s1.name = "张三";
        s1.gender = "男";
        s1.age = 20;
        s1.score = 100;

        s1.show();
        s1.DoClass();

        System.out.println("============");

        Student s2 = new Student();
        s2.name = "李四";
        s2.gender = "男";
        s2.age = 25;
        s2.score = 99;
        s2.DoClass();
        s2.show();

    }
}

